Best Photo Scanning Services

Hi all--Can any of you attest to a service with good prices for digitalizing existing photos? I have color photos (last 10 years) and 70 year old photos. Is it best to use a local service or a mail-in service? Any particular aspects to consider when choosing a service?

Would it be just as cost effective to get a good scanner and do them yourself? Just wondering. I don't have a scanner, but I'm thinking I'd have more peace of mind doing them at home, rather than trusting them to someone else.